/ HELP - last considerations before building 1750x1000x250 mm all-around milll

[Bart]

EddyCurrent
Why would VFD not work with a spindle? Vector drive is just a algorithm of controlling PWM - nothing more - so how wouldn't it work?
And as george uk said is that enough of a difference or in other words what is the difference in practice.
And how does a scalar VFD with encoder on a spindle behave.

george uk
not at all

[EddyCurrent]

EddyCurrent
Why would VFD not work with a spindle? Vector drive is just a algorithm of controlling PWM - nothing more - so how wouldn't it work?
And as george uk said is that enough of a difference or in other words what is the difference in practice.
And how does a scalar VFD with encoder on a spindle behave.

When I try to run the spindle in vector mode it immediately puts the VFD into fault, the fault code (which I can't remember for certain) says something about various parameters having to meet certain conditions, which clearly they do not at the moment. I did not follow up on this and unfortunately I am not in a position to try the spindle just now. Because it worked fine in v/f mode I decided to leave further investigation till later.
With my other machine that does work in vector mode I found quite a difference but that's only because I tried it in both modes so could see the difference first hand. It does seem to be more responsive to varying load such that it does not slow down when load is applied in vector mode, also because I use it at very low speed for bobbin sanding it works much better in vector mode.